#include<bits/stdc++.h>
using namespace std;
int main()
{
    int n;
    cin>>n;
    string s;
    for(int i=1;i<=n;++i)
    {
        cin>>s;
        if(s[i]>='a'&&s[i]<='z')
        {
        	s[i]-=32;
		}
        for(int j=1;j<=s.size()-1;j++)
        {
        	if(s[j]>='A'&&s[j]<='Z')
            {
            	s[j]+=32;
			}
		}
        cout<<s;
    }
    return 0;
}